1. Ubuntu Security Notices
  2. USN-7585-2

USN-7585-2: Linux kernel (FIPS) vulnerabilities

Publication date

19 June 2025

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

  • linux-aws-fips - Linux kernel for Amazon Web Services (AWS) systems with FIPS
  • linux-gcp-fips - Linux kernel for Google Cloud Platform (GCP) systems with FIPS

Details

It was discovered that the CIFS network file system implementation in the
Linux kernel did not properly verify the target namespace when handling
upcalls. An attacker could use this to expose sensitive information.
(CVE-2025-2312)

Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:

  • PowerPC architecture;
  • x86 architecture;
  • iSCSI Boot Firmware Table Attributes driver;
  • GPU drivers;
  • HID subsystem;
  • InfiniBand drivers;
  • Media drivers;
  • MemoryStick subsystem;
  • Network drivers;
  • NTB driver;
  • PCI subsystem;
  • SCSI subsystem;
  • Thermal drivers;
  • JFS file system;
  • File systems infrastructure;
  • Tracing infrastructure;
  • 802.1Q VLAN...

It was discovered that the CIFS network file system implementation in the
Linux kernel did not properly verify the target namespace when handling
upcalls. An attacker could use this to expose sensitive information.
(CVE-2025-2312)

Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:

  • PowerPC architecture;
  • x86 architecture;
  • iSCSI Boot Firmware Table Attributes driver;
  • GPU drivers;
  • HID subsystem;
  • InfiniBand drivers;
  • Media drivers;
  • MemoryStick subsystem;
  • Network drivers;
  • NTB driver;
  • PCI subsystem;
  • SCSI subsystem;
  • Thermal drivers;
  • JFS file system;
  • File systems infrastructure;
  • Tracing infrastructure;
  • 802.1Q VLAN protocol;
  • Asynchronous Transfer Mode (ATM) subsystem;
  • Bluetooth subsystem;
  • IPv6 networking;
  • Netfilter;
  • Network traffic control;
  • Sun RPC protocol;
  • USB sound devices

Update instructions

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
20.04 focal linux-image-5.4.0-1147-aws-fips –  5.4.0-1147.157+fips1  
linux-image-5.4.0-1150-gcp-fips –  5.4.0-1150.159+fips1  
linux-image-aws-fips –  5.4.0.1147.94  
linux-image-gcp-fips –  5.4.0.1150.92  

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References

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